I've a bad habit of buying stuff because I like the picture, but in the cold light of day later, I realise that the top of my arms should be covered (pattern not designed for sleeves would spoil it) or tall and willowy and I am not tall or willowy.
If I could move my backside I would get rid of them, it would make it far easier when sorting through when looking for something and just feeling bad when I do see them and know it will never be. And yes many are near identical just given a tweak, nuther model and pattern number.
Old faithfulls are very well used, and only left when I find another one that is more or less the same. Since Sew Today changed website (still mangy), I have gone elsewhere if I needed one and not got silly because there is money off, if you wait they generally come cheaper.